package com.zy.mobile.message.push.netty.chapter5;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.DelimiterBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;

public class EchoClient {
	
	public void connect(int port,String host)throws Exception{
		
		//配置客户端NIO线程组
		EventLoopGroup group = new NioEventLoopGroup();
		try {
			Bootstrap b = new Bootstrap();
			b.group(group).channel(NioSocketChannel.class)
				.option(ChannelOption.TCP_NODELAY,true)
				.handler(new ChannelInitializer<SocketChannel>() {
					
					@Override
					protected void initChannel(SocketChannel ch)throws Exception {
						// TODO Auto-generated method stub
						ByteBuf delimiter = Unpooled.copiedBuffer("$_".getBytes());
						ch.pipeline().addLast(new DelimiterBasedFrameDecoder(1024, delimiter));
						ch.pipeline().addLast(new StringDecoder());
						ch.pipeline().addLast(new EchoClientHandler());
					}
				
			});
			
			//绑定端口 同步等待成功
			ChannelFuture f = b.connect(host,port).sync();
			//等待服务器监听端口关闭
			f.channel().closeFuture().sync();
			
		} catch (Exception e) {
			// TODO: handle exception
		} finally{
			//优雅退出 释放NIO线程组
			group.shutdownGracefully();
		}
	}
	
	public static void main(String[] args) throws Exception {
		int port = 8080;
		if(args != null && args.length >0){
			try {
				port = Integer.valueOf(args[0]);			
			} catch (Exception e) {
				// TODO: handle exception
				e.printStackTrace();
			}
		}
		new EchoClient().connect(port, "127.0.0.1");
	}

}	
